查询词典 choice reaction

In this paper, high-level ab initio and density functional theory are used to theoretically investigate multi-channel radical reaction. The mechanism and kinemics of radical reaction are studied in our paper. We choice three typical systems which are gaseous phase molecules. Some beneficial results have been obtained.

本文用高水平从头算方法研究了多通道自由基反应的机理和动力学，选取三个有代表性的气相分子反应体系进行了研究，通过对这三个体系的分析得到了一些有益的结论。

Some research and analysis on the reaction of 2,4-difluoronitrobenzene and nucleophilic reagent alcohol sodium (methyl alcohol ,ethyl alcohol, propyl alcohol, n-butyl alcohol, t-butyl alcohol, et hl) and the reaction choice of opposite -F in different solvent and conditions have done in this paper.

论文以2，4-二氟硝基苯为主要原料，研究了其与亲核试剂醇钠(甲醇、乙醇、丙醇、正丁醇、叔丁醇等)在不同溶剂中的反应情况，讨论了在几种代表性的溶剂——醇、四氢呋喃、苯、N，N-二甲基甲酰胺中亲核取代反应的情况，研究了温度、反应时间、亲核试剂、溶剂等条件对亲核取代反应的影响。

Secondly, preparing terpineol and discussion of its results. It was put up by reaction-temperature, reaction-time, the ratio of catalyst and raw material, the kinds of esterify and dosage, the choice of solvent, catalyst life-span and so on. It was discovered that turpentine transform ratio was 86.29%, the yield ratio of terpineol was 68.89%, the selectivity of solid superacid catalyst was 79.84%.

二，松油醇的制备及结果讨论，从反应温度、时间、物料配比、酯化剂的种类与用量、溶剂的选择、催化剂寿命等几个进行了考察，结果发现反应温度为T3、时间L5小时、酯化剂用F3、物料配比为H3％、溶剂用G等时，松节油的转化率为86.29％、松油醇的收率为68.89％、固体超强酸催化剂的选择性为79.84％。

Dual-wavelength ultrashort pulse lasers, of which the most remarkable feature is tunableness and stable synchronism, play an important role in the study and application of physics, chemistry, bioscience and relative forward cross disciplines, since it is the most ideal light source in the study and application of ultrafast laser spectroscopy, multi-excited state femtosecond spectroscopy, procedure controlling femtosecond chemical reaction dynamics, choice biochemical reaction and et cetera.

在物理学、化学、生命利学及其相关的前沿交叉学科中，双波长超短脉冲激光器扮演着一个重要角色，其最显著的特点是具有可调谐性和稳定的同步特性。

Visual attention attribution and diversion (T5) and bilateral two- choice reaction time (T8) were used as the indexes.

采用视觉注意分配与转移(简称T5 )和双手选择反应时(简称T8)为指标。

The results indicated that there were no difference in the time of identifying stimulus at different field of vision of athletes and undergraduate students; there were significant difference in the perceptual speed and perceptual strategy applied in the choice reaction of spatial perception.These all related to the long-term specialties training of the antagonistic events athletes.

结果表明，运动员与普通大学生对不同视野刺激进行识别的心理过程在时间进程上没有差异，但在空间知觉速度以及知觉策略的运用上存在显著差异，这与对抗性项目运动员长期从事专项运动训练有关。

Visual attention attribution and diversion (T5) and bilateral two- choice reaction time (T8) were used as the indexes.

提示漂浮组实验指标的改善不完全是练习效应的结果。结论：漂浮疗法有助于提高被试注意力。

Before and after exercises, the type of DDX-200 multifunction rehabilitation machine is used to test mentality and physiology ability which is produced by Beijing Boda electronic corporation examines some indicators of testers, such as the choice reaction time of vision, attention distribution of vision, arm stability and so on.

使用北京博达电子公司生产的DDX-200型电脑多功能心理生理能力测试康复仪，测试被测的视觉选择反应时，视觉注意分配和手臂稳定性等指标的数据并进行实验前后比较。

By the ways of documentation,expert interview,statistics and experiment,and applying the relative theories of sports training and sports physiology,training,test and analysis were arranged on the choice reaction time of Shanghai amateur women foil fencers.

采用文献资料法、专家访谈法、数理统计法和实验法等方法，运用运动训练学、运动生理学等相关理论，对上海女子花剑队三线运动员的选择反应时进行训练、测量和分析，从而验证一些反应时的专门训练方法是否能短时间内缩短花剑运动员的选择反应时，提高运动员反应速度，为更好的促进上海女子花剑的发展提供条件。

Signalmen who have worked for more than one year and 70 new telegraph operators are subjected to Pattern Number Coding Ability Test, Ravens Progress Matrices, Memory Span Test, Distribution of Attention Test, Knocking Board Test, Choice Reaction Time Test, Action Speed Test, Action Stability Test, 16PF Test, Cornell Medical Index, SAS and SDS. hi the meanwhile their supervisors appraise the performance levels based on five grades from 5,4,3,2 and I .

研究对象为某军区工作1年以上的通信专业技术人员469名，另有作为预测效度检验的报训队新兵70名，分别接受图形数字编码能力测验、瑞文标准推理测验、记忆广度测验、注意分配测验、敲击板测验、选择反应时测验、动作速度测验、动作稳定性测验、卡特尔16PF测验、康奈尔测验、抑郁自评量表测验、焦虑自评量表测验；同时进行专业水平评价。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。